EP0091274A2 - Balance électronique pour compter - Google Patents

Balance électronique pour compter Download PDF

Info

Publication number
EP0091274A2
EP0091274A2 EP83301798A EP83301798A EP0091274A2 EP 0091274 A2 EP0091274 A2 EP 0091274A2 EP 83301798 A EP83301798 A EP 83301798A EP 83301798 A EP83301798 A EP 83301798A EP 0091274 A2 EP0091274 A2 EP 0091274A2
Authority
EP
European Patent Office
Prior art keywords
items
electronic counting
counting scale
maximum
calculated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83301798A
Other languages
German (de)
English (en)
Other versions
EP0091274B1 (fr
EP0091274A3 (en
Inventor
Shozo Yano
Akira Komoto
Yasuhiro Fujinaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP5423982A external-priority patent/JPS58171628A/ja
Priority claimed from JP5424382A external-priority patent/JPS58171632A/ja
Priority claimed from JP5424082A external-priority patent/JPS58171629A/ja
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Publication of EP0091274A2 publication Critical patent/EP0091274A2/fr
Publication of EP0091274A3 publication Critical patent/EP0091274A3/en
Application granted granted Critical
Publication of EP0091274B1 publication Critical patent/EP0091274B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
    • G01G19/42—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight for counting by weighing

Definitions

  • the present invention relates to an electronic counting scale, namely an apparatus for counting the number of items from their weight, and more particularly to an electronic counting scale which adopts a method that unknown number of items are successively added to a known number of items first loaded on the scale.
  • an electronic counting scale which calculates in advance to addition of items the number of items addable without generating an error, whereby a scale operator can add and count as many items as possible at one time within a limit free from a counting error.
  • Another object of the present invention is to provide an electronic counting scale which informs a scale operator of an excessive addition of items by eliminating the numerical figures displayed on the number display or by displaying a specific mark, if the scale is loaded additively with items in excess of a maximum addable number.
  • a further object of the present invention is to provide an electronic counting scale which calculates an error-free addable number of items according to a table or a function prepared beforehand on the basis of known information about the statistical weight distribution of the items to be counted.
  • the apparatus based on the present invention comprises a weighing tray to be loaded with items whose number is to be counted, a weight measuring means for measuring a gravitational force acting on said items loaded on said weighing tray and for outputting a digital weight value corresponding to said gravitational force, a central processing unit which includes an arithmetic organ for processing said digital weight value according to a predetermined program, a memory for storing various calculating formulae, various calculated values and said predetermined program, a number displaying means for displaying the number of said items calculated by said arithmetic organ, and an informing means for informing whether the number of items added on said weighing tray is equal to or exceeds the number calculated according to a predetermined form of calculation.
  • FIG. 1 is a block diagram showing the electric circuitry used in an embodiment of the present invention.
  • a weight detector 1 comprising a load cell or a weight-and-electromagnetic force equilibrating unit, outputs at predetermined time intervals a digital weight data corresponding to the weight loaded on a weighing tray 11.
  • a control unit 2 consists of a microcomputer which comprises an input port 21 for receiving measured data and set values, an output port 22 for outputting measured results, a RAM 23 for storing measured and calculated values, a ROM 24 for storing a program and arithmetic formulae, a driver 25 for a display unit 3, a key matrix 26 to which key signals are to be input from a key board 5, a CPU 27 to control the whole according to a below-described program.
  • the RAM 23 contains data registers devised so as to accept and retain the successively input newer data by pushing out and disposing the previously retained older data.
  • the display unit 3 displays the contents of the display registers A and B provided in the CPU 27.
  • An informing means 4 informs a scale operator whether the number of added items coincides with or exceeds a calculated maximum addable number of items.
  • the "maximum addable number” here means the maximum number of items addable without generating a counting error.
  • the informing , method is,for instance, by'means of eliminating the displayed figures, displaying a specific mark or lighting a separately equipped informing lamp.
  • the key board 5 contains not only figure keys but also a releasing key 52 for releasing the informing performance of the informing means 4 and a key 53 for inputting a coefficient of variation.
  • Fig. 2 is a flow chart.showing the contents of the program stored in the ROM 24.
  • the number p of the samples is stored beforehand in the memory according to the program.
  • the weight W i of each sample is divided by the number n of sample-constituent items to give the average weight of n items, and thus obtained p average weight values are stored in the memory at Step 1.
  • the values n and W i are transferred to the registers A and B, respectively.
  • the operational process is directed to Step.2.
  • Step 2 the average weight X 0 of the total nxp items (or the average of m i ), the standard deviation a and the coefficient of variation C are calculated v according to the following equations: Step 2 is then followed by Step 3, where the total number of the items loaded on the scale at this stage of process is calculated as an "initial" total number N 0 according to the equation given below, (though the initial total number is, of course, known to be nxp): In the next place, at Step 4 the first maximum addable number N' a,l is calculated. The initial total number N 0 and the first maximum addable number N' a,l are transferred to the register A and the register B, respectively. The method of calculating the maximum addable number is as follows.
  • the average weight of the resultant total number N k-1 + N' a,k of items would deviate by (3 ⁇ / ) N' a,k from the true average weight of the entire population, even if all the items to be added had the same weight as the average of the entire population.
  • N' a,k is given by
  • the number N' a,k obtained from Eq. (7) gives the above- mentioned maximum addable number, namely the maximum number of items addable without generating a counting error.
  • Step 5 After the first maximum addable number N a,l is obtained at Step 4, a flag 1 which shows the completion of the initial processing is set up to make the program proceed hereafter to Step 5, where an actually added number N a,k is calculated according to the equation: where M k is the total weight after the k-th addition of items and X k is the provisional average weight obtained from M k divided by N k . Then it is judged whether the value of N a,k is equal to or smaller or larger than the value of N' a,k calculated according to E q . ( 7 ).
  • Step 6 the contents of the register storing N a,k and of the register storing the provisional average weight X k are revised as follows: Particularly, if N a,k is just equal to N' a,k , the display a, A informs it by several times flickering the numerical figures displayed thereon. The case of N a,k being larger than N' a,k is described later. Step 5 is then followed by Step 4 where the next value of N' a,k is calculated again with Eq. (7). The subsequent process is repeated through the above-described routine wherein the flag 1 is set up. In the routine, each time the items are added not in excess of N' a,k both the counted total number and the maximum addable number are increased.
  • a flag 2 which is named an over-flow flag is set up, and the excessive addition of items is informed, for instance, by displaying a predetermined blank sign instead of numerical figures on the display A.
  • the program flow is directed to Step 7, where the number N a,k - N' a,k of items to be removed from the scale is calculated and displayed on the display B.
  • the flag 2 is set down if a relation N a,k ⁇ N' a,k is achieved by removing a certain number of items.
  • the method of calculating the maximum addable number N' a,k may be substituted by another one.
  • the concept of the t-distribution may be introduced to increase the accuracy of the measurement.
  • a constant t in the t-distribution is given by where X is a calculated average, p the true average of the population, ⁇ the standard deviation and N the number of items. The t-distribution is described in a standard textbook of statistics.
  • This table shows the maximum number N' a,k addable to the already known counted numbers N k-1 , with a coefficients of variation C v used as a parameter.
  • N a,k N' a,k is judged.
  • the process of judgement is similar to that employed in the flow chart shown in Fig. 2, so the description is left out.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Complex Calculations (AREA)
EP83301798A 1982-03-31 1983-03-30 Balance électronique pour compter Expired EP0091274B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP5423982A JPS58171628A (ja) 1982-03-31 1982-03-31 電子計数はかり
JP5424382A JPS58171632A (ja) 1982-03-31 1982-03-31 電子計数はかり
JP54243/82 1982-03-31
JP54240/82 1982-03-31
JP54239/82 1982-03-31
JP5424082A JPS58171629A (ja) 1982-03-31 1982-03-31 電子計数はかり

Publications (3)

Publication Number Publication Date
EP0091274A2 true EP0091274A2 (fr) 1983-10-12
EP0091274A3 EP0091274A3 (en) 1985-06-19
EP0091274B1 EP0091274B1 (fr) 1988-06-22

Family

ID=27295214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83301798A Expired EP0091274B1 (fr) 1982-03-31 1983-03-30 Balance électronique pour compter

Country Status (3)

Country Link
US (1) US4493384A (fr)
EP (1) EP0091274B1 (fr)
DE (1) DE3377162D1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155190A (en) * 1984-03-01 1985-09-18 Cherlyn Electronics Counting by weighing
FR2563625A1 (fr) * 1984-04-28 1985-10-31 Sartorius Gmbh Procede d'initialisation d'une balance compteuse, et balance compteuse pour la mise en oeuvre de ce procede
US4819015A (en) * 1986-06-13 1989-04-04 K-Tron International, Inc. Anti-theft product rack and method
EP0325439A2 (fr) * 1988-01-18 1989-07-26 Shimadzu Corporation Balance électronique pour compter
WO1989012217A1 (fr) * 1988-06-07 1989-12-14 Percell Group Limited Procede et appareil servant a determiner le nombre et/ou la valeur d'objets peses
EP0354044A2 (fr) * 1988-08-04 1990-02-07 John Kirby Comptage d'objets alimentés en continu
US5000274A (en) * 1989-01-19 1991-03-19 K-Tron International, Inc. Weight sensor
US5074368A (en) * 1986-06-13 1991-12-24 K-Tron Technologies, Inc. Self-calibrating apparatus for article input and removal monitoring system
US5199517A (en) * 1988-08-04 1993-04-06 John Kirby Counting articles
GB2270986A (en) * 1992-09-16 1994-03-30 Cashmaster Int Ltd Method of counting articles by weighing
WO2015055989A1 (fr) * 2013-10-15 2015-04-23 Cashmaster International Limited Perfectionnements apportés ou se rapportant à des systèmes de comptage à comptage par pesée

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530170C2 (de) * 1985-08-23 1994-03-10 Sartorius Gmbh Zählwaage
US5391844A (en) 1992-04-03 1995-02-21 Weigh-Tronix Inc Load cell
US5442146A (en) 1992-04-03 1995-08-15 Weigh-Tronix, Inc. Counting scale and load cell assembly therefor
US5313023A (en) * 1992-04-03 1994-05-17 Weigh-Tronix, Inc. Load cell
US5336854A (en) * 1992-04-03 1994-08-09 Weigh-Tronix, Inc. Electronic force sensing load cell
US5531309A (en) * 1995-08-28 1996-07-02 Bally Gaming International, Inc. Method and apparatus for detecting fraud or theft in a gaming machine
DE59812856D1 (de) * 1997-03-11 2005-07-21 Mettler Toledo Gmbh Elektronische Waage
GB0210945D0 (en) * 2002-05-14 2002-06-19 Volumatic Ltd "Apparatus for counting articles by weight"
US7180014B2 (en) * 2003-03-20 2007-02-20 Boris Farber Method and equipment for automated tracking and identification of nonuniform items
US7813973B2 (en) * 2003-10-10 2010-10-12 Inventrol Llc Inventory monitoring system
US20080078136A1 (en) * 2006-09-29 2008-04-03 Ken Shinaut Counter for counting elongate objects
US8530763B2 (en) * 2009-06-09 2013-09-10 James Roy Bradley Counting scale and method of counting involving determination of submultiples by means of a series of divisors
WO2020051103A1 (fr) * 2018-09-04 2020-03-12 Laitram, L.L.C. Système et procédé de mesure du poids moyen et de l'uniformité d'un échantillon

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213489A1 (fr) * 1973-01-08 1974-08-02 Keller Spezialtechnik Gmbh
US3888321A (en) * 1973-02-16 1975-06-10 Leco Corp Electronic balance
GB1517231A (en) * 1976-04-02 1978-07-12 Nat Controls Counting scale and method
DE2820843A1 (de) * 1977-05-15 1978-11-23 Shinko Denshi Kk Verfahren zum zaehlen der anzahl von gegenstaenden unter verwendung einer waage
GB1576301A (en) * 1978-05-25 1980-10-08 Avery Ltd W & T Equipment for counting components by weight
JPS56142420A (en) * 1980-04-08 1981-11-06 Teraoka Seiko Co Ltd Digital display type counting scale

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56142419A (en) * 1980-04-08 1981-11-06 Teraoka Seiko Co Ltd Recounting device for digital display counting scale
JPS57203922A (en) * 1981-06-10 1982-12-14 Tokyo Electric Co Ltd Number counting balance

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213489A1 (fr) * 1973-01-08 1974-08-02 Keller Spezialtechnik Gmbh
US3888321A (en) * 1973-02-16 1975-06-10 Leco Corp Electronic balance
GB1517231A (en) * 1976-04-02 1978-07-12 Nat Controls Counting scale and method
DE2820843A1 (de) * 1977-05-15 1978-11-23 Shinko Denshi Kk Verfahren zum zaehlen der anzahl von gegenstaenden unter verwendung einer waage
US4157738A (en) * 1977-05-15 1979-06-12 Shinko Denshi Company Limited Method for counting the number of articles using a weighing machine
GB1576301A (en) * 1978-05-25 1980-10-08 Avery Ltd W & T Equipment for counting components by weight
JPS56142420A (en) * 1980-04-08 1981-11-06 Teraoka Seiko Co Ltd Digital display type counting scale

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Vol. 6, no. 18 (P-100) (896), February 2, 1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 18 (P-100)(896), February 2, 1982 & JP-A-56 142 420 *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155190A (en) * 1984-03-01 1985-09-18 Cherlyn Electronics Counting by weighing
FR2563625A1 (fr) * 1984-04-28 1985-10-31 Sartorius Gmbh Procede d'initialisation d'une balance compteuse, et balance compteuse pour la mise en oeuvre de ce procede
DE3415962A1 (de) * 1984-04-28 1985-10-31 Sartorius GmbH, 3400 Göttingen Verfahren zur initialisierung einer zaehlwaage und zaehlwaage zur durchfuehrung des verfahrens
US4819015A (en) * 1986-06-13 1989-04-04 K-Tron International, Inc. Anti-theft product rack and method
US5074368A (en) * 1986-06-13 1991-12-24 K-Tron Technologies, Inc. Self-calibrating apparatus for article input and removal monitoring system
EP0325439A3 (en) * 1988-01-18 1990-12-05 Shimadzu Corporation Electronic counting balance
EP0325439A2 (fr) * 1988-01-18 1989-07-26 Shimadzu Corporation Balance électronique pour compter
US5193629A (en) * 1988-06-07 1993-03-16 Percell Group Limited Method and apparatus for determining the number and/or value of weighed items
GB2243913A (en) * 1988-06-07 1991-11-13 Percell Group Ltd Method and apparatus for determining the number and/or value of weighed items
GB2243913B (en) * 1988-06-07 1992-05-20 Percell Group Ltd Method and apparatus for determining the number and/or value of weighed items
WO1989012217A1 (fr) * 1988-06-07 1989-12-14 Percell Group Limited Procede et appareil servant a determiner le nombre et/ou la valeur d'objets peses
EP0354044A3 (en) * 1988-08-04 1990-11-14 John Kirby Counting articles
GB2221546A (en) * 1988-08-04 1990-02-07 John Kirby Counting articles
EP0354044A2 (fr) * 1988-08-04 1990-02-07 John Kirby Comptage d'objets alimentés en continu
GB2221546B (en) * 1988-08-04 1992-07-29 John Kirby Counting articles
US5199517A (en) * 1988-08-04 1993-04-06 John Kirby Counting articles
US5000274A (en) * 1989-01-19 1991-03-19 K-Tron International, Inc. Weight sensor
GB2270986A (en) * 1992-09-16 1994-03-30 Cashmaster Int Ltd Method of counting articles by weighing
GB2270986B (en) * 1992-09-16 1995-05-24 Cashmaster Int Ltd Method of counting articles
WO2015055989A1 (fr) * 2013-10-15 2015-04-23 Cashmaster International Limited Perfectionnements apportés ou se rapportant à des systèmes de comptage à comptage par pesée

Also Published As

Publication number Publication date
US4493384A (en) 1985-01-15
EP0091274B1 (fr) 1988-06-22
EP0091274A3 (en) 1985-06-19
DE3377162D1 (en) 1988-07-28

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